Fatent offjc



a! A. PQLLY.

SCREW COUPLING.

U10 Nadel) Patented'June 2 m M E w. J 6

A fro/WE rs FGI' LY, F NEW YORK, N. Y.

6h 1 The elbow Aie peovided with en iubernzaliytbeeeflefi portion 1 5, in'whiob. ohm" near the bereoif formed an internal circumfew-M221 woove C, which cote away e po:- 5

,tion 1: i e In the side of the elbow E "2e ebole D,which eommunicetes with to the i drewinge, 5o. 2?, oer? the eiz'eemferentieYgroove C.

1 To form the peeking-ring in the groove 6 Figure 1 is e ioogimciinei. eeetion of pigle en externally-$11reeded mandrel E, which is 6e 1e elbow, showing one en thereof eperefi for smellea' in diameter than the internal diamekbe eppiieetion woo improvement,While eel off the screw portion of the elbow, is inebd filueimtee *cbe manner of eypiying eerted. in the threaded portion, as shown, and pent; end Elie e'side elem lea- 3. or: analogous material is melted and y in eeeti zm, oi e pipe-elbow propourerl through the lateral hole D into the 6 21 mm improvement, eenolerepeee surrounding the mandrel E. ee-of referenoe iadieate oorre When the mandrel E is removed from the viewe, 4 threefleo. portion of the elbow, an internally- .vemfiion ie provide; tbreeded eoift-roefiel pecking-ring F is left in 301': fibe'eoreweooglinge of pipes the geooveC/end owing to the reduced di- T .1, 1 IA,

so and ouber eez'ew-jointe mm and gee tight; emecer of the mandrel E the packing-ring F eieo, to provide en eppemtee formeking such is of 68151119 infiernel diameter than the join ebreeoefl portlon of the elbow. With this oon- "ievemion ooneiete in the zso'mbir-efioe, efimouon when the teperedend of the pipe is v 1 the log herring eirem 1 ring F and expeos the same, so as to aboroeghly fill the groove (3 and the threads of the pipeeereweflinfio the elbow. After-the pipe has of we oteizeeflg ee ew been eove ved home and flee fitis made as tight g I *oove emi m ee poes'ieie by tbismeene, if it becomes neoes- .e --tb.sreede 1351*?" see to secure e still greater compression of Fee soft-mete peeking-ring F, this may be Mo eon" inbeeneiiy-tbreeefi @oee by inserting a punch in the hole D and coupling; beving "i 1 hole eommumoeb forcing the mete! conteinedjhei ein into the the oir'oumx geoove end cow enmfle': specs around the plpe. In heu of a,

leed arm 2 51:23.1 wia-h "pe'oeb, the hole D may be internally threaded groove out in the isilreee l pert g ring of. Fee,

ioteg in'tbe 430E321} @2111 e eerew -1- may be inserted therein, and eekirsgfog for ime compression of the soft motel maybe efe'iiieeted. by turning the eeeeerew so as to'foroe for: it into the met-e1 endeeuse the metal bgfiow u, 3-,- inhtbeeneula-r epeoe ound the pipe; fter boie by meeoe the joint iemec'leup end-epp lied where swam or by eerew aleeerl in r or hot iiqmde pass through It the lead o the mm the peokiog ing, time oeueing thememl peoklng expends book to lie normal stete by e5 rfizebniiei groove, ext the eeme time joint, it being understood, of com-se men the elm haw-form em imfmete eouteet with ke ex ieed bee been compressed when c4310..

temeiy abreeeefii pow-me oi 523133 eoepb ng. gull be eeen than the soft-elem; rmg 1e In describing invention if beye ebown oeez men xebeeeellgr-threeded 1165118110 memite epolieetion to e eipeelbow; but it meg; be be? and as o: e diemeter less tbe-n mbe bore ofi,

'e'opfiefi with e use "iveb'ege to MY. eeeeweoob tbreeoee member, and wet it 1e than is Y intemefiy-sorew-terseedei pert oi eoeewecl intobe elbow it enters the paoking- 7 amend end closely fill toe beeoming heeted and makes an absolute tight tightly-compressed ring, but relieves the same of the strain of expansion and contrsctio'lx, the strain being sustained by the interssl threads of the female member and not by the soft ring iistlae' eboveeomtmofigfl, @19 the pressure applied through the radial ope iiing is additional to and coscts with the out- P s re of the mele member of th ,coupliug. r or a I am aware that ametsl pecking having shallow threads formed in it has been s?- ranged in an annular groove of a, couplingsocket whose in ternal surface is not thresfled, the packing being of less internal diameterthon "the diameter of the socket, so that when the pipe is screwed into the socket it eats the thread deeper and is held in the saitl socket solely by its engagement with the packing; sml I am also swore that an. internallythreaded socket has been provided with an annular I groove, in which is placed a leather or other similar pecking, said packing being of less internal diameter than the (limneter of the said socket, so that the said pecking will be firmly pressed into its socketwhen the pipe-section is screwed into the said socket, and I therefore do not claim such as my invention. 4

Having-thus deserieed any i'nvent%os;--- claim as new end desire to secure by Letters Potent- 1. In a coupling, the combination, with an port-ion, Twit-h a, portion of the threaded surface on each side of the groove, of at metal pecking cost, in said groove and having on internal diameter less than. the rliemeter of "*scriiiefif x v 2. In e C9flPiiHg,-tii6 combination, with on intersolly tiii'eeded female member having on snnnlorlgroovein its tiiresderi portion, of

having an} "uterneliy-tiiresfiet'i surfsce'ofi less diometerftbe'n the diameter of the threaded surface -of the female member, whereby when at pipe 'is screwed into the said female memof the ssici pipe, snbstaolfi'iiiiiy as riesleribed.-

3lfln a coursing, theeombiustios; with on internally-threaded female member having leading from the outside to tire-said groove, of a, soft-metelring il'lifiifli&1y S8i-8W-Eh!'e&dd sud fitting in 'the said groove, the we ring being of less internal diameter than the dimember, smi s serew-tliresdefi plug for ales-- ing the said; opening and compressing the soft-metal ring into the groove, substantislly s s-sud rem-s9 purpose setforth.

CORNELIUS ALFRED FOLLY. Witnesses:

' EDWD. M. CLARK,

internally-screw-threaded female member EDGAR TATE.

having so eiizmler groove in its threaiieii 35' the seid fen ielfe member, s ibstentieliy es de- 4,0 I

s metslli I easing cost in ssifi groove and 5 her-the packing will oe expsnclecl ass msde 5;: to thoroughly fill the grooife mini thej threads 4 an annular groove and s threaded opening 5 5 snieter of the said intesnsiiy-thresded female 60. 

